CN209938848U

CN209938848U - Folding handrail and have folding scooter of this handrail

Info

Publication number: CN209938848U
Application number: CN201920412808.9U
Authority: CN
Inventors: 李静
Original assignee: Yongkang Eagle Industry & Trade Co Ltd
Current assignee: Yongkang Eagle Industry & Trade Co Ltd
Priority date: 2019-01-23
Filing date: 2019-03-29
Publication date: 2020-01-14
Anticipated expiration: 2029-03-29
Also published as: CN209757392U; CN109774842A; CN209757395U; CN209757393U; CN109850045B; CN109774842B; CN209757394U; WO2020151099A1; CN109850045A

Abstract

The utility model relates to the technical field of folding scooters, in particular to a folding handrail and a folding scooter with the same, wherein the folding handrail comprises a left handrail and a right handrail, a first folding device is arranged between the left handrail and the right handrail, and the left handrail and the right handrail can rotate and fold relative to the first folding device; the first folding device comprises a right driving wheel and a left driving wheel, and an unlocking button capable of moving back and forth is arranged between the right driving wheel and the left driving wheel; the terminal surface shaping of right drive wheel and/or left drive wheel has the joint groove with unblock button looks adaptation, and restrict its rotation, when folding handrail is rolled over to 45, second unblock groove can be gone into to joint portion automatic card, make the handrail keep 45 states at the slope, so as to satisfy different crowds' user demand, when folding handrail is rolled over to 90, third card groove can be gone into to joint portion automatic card, beta structure at this moment is in the lock state of dying, handrail after folding is in the lock state of dying, can not become flexible, conveniently take.

Description

Folding handrail and have folding scooter of this handrail

Technical Field

The utility model relates to a folding scooter technical field refers in particular to a folding handrail and have folding scooter of this handrail.

Background

The folding scooter greatly increases the diversified selection of people for the travel mode, the travel mode of sitting on a subway or combining a public transport and the folding scooter is often adopted, the handrail of the existing scooter is fixed and unchangeable at two sides, when the scooter needs to be stored, the fixed and unchangeable handrail occupies a large part of space and wastes space resources, however, a handrail folding structure also appears on the market, such as the handrail folding structure of the scooter, the folding scooter or the balance car disclosed by [ Chinese utility model ] CN201520230317.4, which comprises a vertical rod connecting seat, a sleeve with one end cut into two sides of the vertical rod connecting seat, a bolt which penetrates through the vertical rod connecting seat and the sleeve and is used for locking the sleeve, a spring telescopic component which is arranged in the sleeve and penetrates through the sleeve, and a stretching element with one end cut into the sleeve and connected with the spring telescopic component, and the spring telescopic component arranged in the sleeve is utilized, one end of the spring telescopic assembly penetrates through the sleeve and is inserted into the through hole of the bolt, and the effect that the stretching element is stretched outwards to enable one end of the spring telescopic assembly to be disengaged from the through hole can be achieved, so that the handrail can be folded.

Although the improved armrest realizes the folding function, the armrest cannot be limited at a certain angle in the folding process, and the requirement of a user cannot be met.

Disclosure of Invention

The utility model aims at providing a folding handrail and have folding scooter of this handrail, the joint groove is solved the handrail and is folded, can't keep the problem of a limited angle, has spacing effect.

The purpose of the utility model is realized like this: a folding handrail comprises a left handrail and a right handrail, wherein a first folding device is arranged between the left handrail and the right handrail, and the left handrail and the right handrail can be rotationally folded relative to the first folding device; the first folding device comprises a right driving wheel and a left driving wheel, and an unlocking button capable of moving back and forth is arranged between the right driving wheel and the left driving wheel; and a clamping groove matched with the unlocking button is formed in the end surface of the right driving wheel and/or the left driving wheel and limits the rotation of the right driving wheel and/or the left driving wheel.

Preferably, the folding mechanism further comprises a second unlocking groove and a third clamping groove, wherein the clamping groove, the second unlocking groove and the third clamping groove are respectively and sequentially arranged on the outer edge part of the right driving wheel and/or the left driving wheel and are used for being matched with the unlocking button in different folding stages.

Preferably, a clamping portion is formed at one end of the unlocking button, and the clamping portion is clamped between the right driving wheel and the left driving wheel and limits rotation of the right driving wheel and the left driving wheel.

Preferably, the right end of the left handrail is connected with the right driving wheel, and the left end of the right handrail is connected with the left driving wheel; the right driving wheel abuts against the left driving wheel, and the right driving wheel and the left driving wheel rotate and fold by taking respective circle centers as shafts.

Preferably, gear teeth are formed on the right driving wheel and the left driving wheel, and the right driving wheel and the left driving wheel can be meshed with each other through the gear teeth.

Preferably, the outer sides of the right transmission wheel and the left transmission wheel are provided with armrest covers, and the other end of the unlocking button extends out of the armrest covers to form a pressing part.

Preferably, a first spring is arranged between the clamping part and the armrest cover.

Preferably, a support is further mounted between the right driving wheel, the left driving wheel and the armrest cover, hole sites are formed in the left side and the right side of the support, and the right driving wheel and the left driving wheel are rotatably arranged on the hole sites by taking respective circle centers as axes.

The folding scooter also comprises a scooter pedal, wherein the front part of the scooter pedal is connected with a supporting pipe, and the supporting pipe is rotatably arranged on the scooter pedal through a second folding device; the foldable handrail is installed at the upper end of the handrail tube, the front wheels are arranged at the lower end of the handrail tube, and the rear wheels are arranged at the rear part of the bicycle pedal.

Preferably, the folding handrail is connected with the second folding device through a linkage mechanism, an unlocking button is arranged in the folding handrail, and the folding handrail and the handrail tube can be folded simultaneously by pressing the unlocking button; the second folding device comprises a locking device and a fork tube, an arc-shaped slide way is arranged in the locking device, a slide block is arranged in the fork tube, a fixed shaft penetrates through the lower end of the slide block, and the fixed shaft is slidably arranged in the arc-shaped slide way; the locking device is mounted at the front part of the pedal, and the lower end of the handrail tube is rotatably connected with the locking device through a fork tube so as to be rotated and folded; locking clamping grooves are formed in the two ends of the arc-shaped slide way towards the inner side, and the sliding block and the fork pipe can be driven to generate relative displacement by rotating the folding handrail through the linkage mechanism, so that the fixing shaft is driven to move in the arc-shaped slide way; the lower part of the holding pipe is slidably provided with a sliding head, the upper end of the sliding block is provided with an inclined plane for the sliding head to extrude, the folding handrail is connected with and drives the sliding head through the linkage mechanism, and the sliding head can move in the holding pipe by rotating the folding handrail so as to extrude the inclined plane and further drive the sliding block to move in the fork pipe; the upper end of the sliding head is provided with a fixed head, the fixed head is positioned at the upper end of the inclined surface and is fixed on the supporting pipe, and a second spring is abutted between the fixed head and the sliding head; the linkage mechanism is a steel wire rope set, and the folding handrails are connected through the steel wire rope set and drive the second folding device; a cavity is formed in the middle of the sliding block, a semicircular hole for a fastening piece to penetrate through is formed in one side of the cavity, and a third spring is abutted between the fastening piece and the cavity; an inner pipe penetrates through the supporting pipe, the upper end of the inner pipe extends out of the supporting pipe and is connected with the folding handrail, a sheath is arranged between an opening at the upper end of the supporting pipe and the inner pipe, an elastic opening is formed in the opening at the upper end of the supporting pipe, and a quick-detaching piece is arranged on the periphery of the elastic opening; the spring pin piece is elastically clamped in the inner tube, the other end of the spring pin piece extends out of the inner tube and forms a convex block, and the supporting tube is provided with a plurality of positioning holes for the convex block to pass through; the locking device is provided with a rotating hole, one end of the fork tube is rotatably fixed in the rotating hole through a fastener, and the fork tube can rotate and fold relative to the bicycle pedal.

Compared with the prior art, the utility model outstanding and profitable technological effect is:

1. when folding handrail folded 45, joint portion can automatic card go into the second and separate the locked groove, makes the handrail keep at 45 states of slope to in order to satisfy different crowds' user demand, when folding handrail folded 90, joint portion can automatic card go into the third card groove, and beta structure at this moment is in the lock dead state, and folding handrail after folding is in the lock dead state, can not become flexible, conveniently takes.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic view of the folded state of the present invention.

Fig. 3 is a schematic diagram of the explosion structure of the present invention.

Fig. 4 is a top view of the present invention.

Fig. 5 is a sectional view of the structure at a-a in fig. 4.

Fig. 6 is an enlarged view of the structure at B in fig. 5.

Fig. 7 is an enlarged view of the structure at C in fig. 5.

Fig. 8 is a schematic view of the folding operation of the folding handrail.

Fig. 9 is a schematic structural diagram of the first folding device.

Fig. 10 is a top view of the folding handrail.

Fig. 11 is a sectional view of the structure at D-D in fig. 10.

Fig. 12 is a front view of the folding armrest.

Fig. 13 is a sectional view of the structure at E-E in fig. 12.

Figure 14 is a top view of a handrail tube and a folded handrail.

Fig. 15 is a sectional view of the structure at F-F in fig. 13.

Reference numerals: 1-vehicle pedal; 2-supporting the pipe; 3-folding the armrest; 3 a-left armrest; 3 b-right armrest; 4-a first folding device; 4 a-a right driving wheel; 4 b-a left driving wheel; 5-an unlock button; 6-a clamping part; 7-armrest covers; 8-pressing part; 9-a first spring; 10-a scaffold; 11-hole site; 12-gear teeth; 13 a-a snap groove; 13 b-a second unlocking slot; 13 c-a third card slot; 14-a locking device; 15-a fork tube; 16-a spin hole; 17-a fastener; 18-an arcuate chute; 19-a slide block; 20-a fixed shaft; 21-locking card slot; 22-a sliding head; 23-inclined plane; 24-wire rope groups; 25-a fixed head; 26-a second spring; 27-a cavity; 28-semicircular hole; 29-a third spring; 30-an inner tube; 31-a sheath; 32-a flexible opening; 33-quick release; 34-a latch member; 35-a bump; 36-positioning holes; 37-front wheel; 38-rear wheel.

Detailed Description

The following description of the present invention will be made in detail with reference to the accompanying drawings 1 to 15.

A folding handrail and a folding scooter with the same.

As shown in fig. 1, the foldable bicycle comprises a bicycle pedal 1, a rotatable handrail 2 is connected to the front portion of the bicycle pedal 1, the handrail 2 is rotatably arranged at the front end of the bicycle pedal 1 through a second folding device, a foldable handrail 3 is mounted at the upper end of the handrail 2, a front wheel 37 is arranged at the lower end of the handrail 2, and a rear wheel 38 is arranged at the rear portion of the bicycle pedal 1.

Referring to fig. 1 and 2, after the unlocking button 5 is pressed, the folding handrail 3 can be rotated downward to perform a folding operation, and the handrail tube 2 can also be rotated toward one side of the step plate 1 to perform a folding operation.

With reference to fig. 8 and 9, the first folding device 4 comprises a right transmission wheel 4a and a left transmission wheel 4b, the right end of the left handrail 3a is connected with a right driving wheel 4a, the left end of the right handrail 3b is connected with a left driving wheel 4b, the right driving wheel 4a and the left driving wheel 4b are abutted against each other, and the right driving wheel 4a and the left driving wheel 4b respectively rotate towards the inner side by taking respective circle centers as axes to achieve the folding function, and gear teeth 12 are formed on the right transmission wheel 4a and the left transmission wheel 4b, the right transmission wheel 4a and the left transmission wheel 4b can be meshed with each other through the gear teeth 12, at the same time, at least one clamping groove 13a matched with the clamping part 6 is formed on the end surface of the right driving wheel 4a and/or the left driving wheel 4b, when the engaging portion 6 is engaged in the engaging groove 13a, the rotation between the right driving wheel 4a and the left driving wheel 4b can be restricted.

Referring to fig. 10 and 11, an armrest cover 7 is installed on the outer sides of the right driving wheel 4a and the left driving wheel 4b, an unlocking button 5 capable of moving back and forth is arranged between the right driving wheel 4a and the left driving wheel 4b, a clamping portion 6 is formed at one end of the unlocking button 5, and the clamping portion 6 is clamped between the right driving wheel 4a and the left driving wheel 4b and limits rotation of the clamping portion.

With reference to fig. 11 and 13, the other end of the unlocking button 5 extends out of the armrest cover 7 to form a pressing portion 8, a first spring 9 is disposed between the clamping portion 6 and the armrest cover 7, so that when an external force pressing on the pressing portion 8 is removed, the unlocking button 5 will rebound to the original position due to elastic deformation of the first spring 9, a support 10 is further installed between the right driving wheel 4a, the left driving wheel 4b and the armrest cover 7, hole locations 11 are respectively formed on the left side and the right side of the support 10, and the right driving wheel 4a and the left driving wheel 4b are rotatably disposed on the hole locations 11 by taking respective circle centers as axes.

With reference to fig. 5 and 6, in order to better achieve the above purpose, a locking device 14 is installed at the front portion of the vehicle pedal 1, the lower end of the handrail 2 is rotatably connected to the locking device 14 through a fork tube 15, a rotating hole 16 is formed in the locking device 14, one end of the fork tube 15 is rotatably fixed in the rotating hole 16 through a fastener 17, the fork tube 15 can be rotatably folded relative to the vehicle pedal 1, specifically, an arc-shaped slide way 18 is formed in the locking device 14, recessed locking clamp grooves 21 are formed at two ends of the arc-shaped slide way 18, a slide block 19 is installed in the fork tube 15, a fixed shaft 20 is inserted into the lower end of the slide block 19, the fixed shaft 20 can slide in the arc-shaped slide way 18, the slide block 19 and the fork tube 15 can directly or indirectly displace relative to each other by rotating the folding handrail 3, and the fixed shaft 20 is further driven to move in the arc-shaped slide, a cavity 27 is formed in the middle of the slider 19, a semicircular hole 28 for allowing the fastening member 17 to pass through is formed in one side of the cavity 27, and a third spring 29 is abutted between the fastening member 17 and the cavity 27.

Specifically referring to fig. 7, a sliding head 22 is slidably disposed at a lower portion of the handrail tube 2, a steel wire rope group 24 is fixed on the folding handrail 3, the other end of the steel wire rope group 24 is fixedly connected with the sliding head 22, an inclined surface 23 for the sliding head 22 to extrude is formed at an upper end of the slider 19, the folding handrail 3 is connected with and drives the sliding head 22 through a linkage mechanism, the sliding head 22 can move in the handrail tube 2 by rotating the folding handrail 3, so as to extrude the inclined surface 23, and further drive the slider 19 to move in the fork tube 15, a fixing head 25 is mounted at an upper end of the sliding head 22, the fixing head 25 is located at an upper end of the inclined surface 23 and fixed on the handrail tube 2, a second spring 26 is abutted between the fixing head 25 and the sliding head 22, and the folding handrail 3 can be folded after the unlocking button 5 is pressed, the device can rotate and fold the handrail tube 2 simultaneously when folding the handrail 3 through the arranged linkage mechanism, namely the steel wire rope group 24, without pressing other folding switches, and is convenient to operate.

With reference to fig. 14 and 15, an inner tube 30 penetrates through the supporting tube 2, an elastic pin member 34 is elastically clamped in the inner tube 30, the other end of the elastic pin member 34 extends out of the inner tube 30 and is provided with a protruding block 35, because the elastic pin member 34 has elasticity, after the protruding block 35 is pressed, the elastic pin member 34 is compressed, so that the protruding block 35 retracts into the supporting tube 2, the supporting tube 2 and the inner tube 30 can move relatively at the moment, so that the height is adjusted, and a plurality of positioning holes 36 for the protruding block 35 to pass through are formed in the supporting tube 2. The upper end of the inner pipe 30 extends out of the holding pipe 2 and is connected with the folding handrail 3, a sheath 31 is arranged between an opening at the upper end of the holding pipe 2 and the inner pipe 30, an elastic opening 32 is formed at the opening at the upper end of the holding pipe 2, and a quick-release part 33 is arranged on the periphery of the elastic opening 32.

The specific working process of the product folding is as follows:

firstly, the unlocking button 5 in the armrest cover 7 is pressed, namely, the pressing part 8 is pressed by applying force, at this time, the clamping part 6 of the unlocking button 5 leaves the clamping grooves 13a on the right driving wheel 4a and the left driving wheel 4b, the first spring 9 is compressed at the same time, at this time, the right driving wheel 4a and the left driving wheel 4b can relatively rotate, and the pressing part 8 can not be pressed any more, at this time, the clamping part 6 is forced to recover the original position due to the elastic deformation of the first spring 9, therefore, when the right driving wheel 4a and the left driving wheel 4b rotate, the clamping part 6 is attached to the surfaces of the right driving wheel 4a and the left driving wheel 4b, then the gear teeth 12 are mutually engaged, namely, the left and right armrests can be rotated and folded, because the steel wire rope group 24 is fixed on the folded armrest 3, then when the folded armrest 3 rotates downwards, the right driving wheel 4a and the left driving wheel 4b simultaneously, the steel wire rope 28 is pulled to shorten the length of the steel wire rope 28, so that the sliding head 22 connected below the steel wire rope 28 is driven to move upwards, when the folding handrail 3 is folded to 45 degrees, the clamping part 6 can be automatically clamped into the second unlocking groove 13b, the folding operation is convenient, meanwhile, in the rotating process of the folding handrail 3, the sliding head 22 moves upwards and compresses the second spring 26, the sliding head 22 just moves up to the position of the inclined surface 23 of the sliding block 19, then the sliding head 22 pushes the sliding block 19 downwards, so that the sliding block 19 moves downwards, when the sliding block 19 moves downwards, the third pressure spring 29 is compressed, the fixing shaft 20 arranged on the sliding block 19 moves into the arc-shaped slideway 18 from the locking clamping groove 21, the fork tube 15 can rotate and fold leftwards, and the fixing shaft 20 slides leftwards in the arc-shaped slideway 18, until the pin shaft slides to the leftmost side, the pin shaft cannot slide leftwards any more, at this time, the straight pipe 13 is already in a completely folded state, after the scooter is in the completely folded state, the foldable handrail 3 is folded from 45 degrees to 90 degrees, the wire rope set 24 is pulled continuously, the length of the wire rope set 24 is further shortened, the sliding head 22 continues to move upwards, the second spring 26 is further compressed, at this time, the sliding head 22 moves to the upper end of the inclined surface 23 and leaves the inclined surface 23, the sliding head 22 does not push the sliding block 19 downwards, and because the inclined surface 22 loses the pressure applied by the sliding head 22, the compressed third pressure spring 29 at the other end of the sliding block 19 releases the pressure, the third pressure spring 29 stretches to an opened state, so that the sliding block 19 is pushed upwards, when the sliding block 19 moves upwards, the fixed shaft 20 enters the locking slot 21 again from the arc-shaped slide way 18, and when folding handrail 3 and roll over 90, third draw-in groove 13c can be gone into to joint portion 6 automatic card, and beta structure at this moment is in the lock state of dying, and scooter after folding is in the lock state of dying, can not become flexible, conveniently takes.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A folding handrail, characterized in that the folding handrail (3) comprises a left handrail (3a) and a right handrail (3b), a first folding device (4) is arranged between the left handrail (3a) and the right handrail (3b), and the left handrail (3a) and the right handrail (3b) can be folded in a rotating manner relative to the first folding device (4); the first folding device (4) comprises a right driving wheel (4a) and a left driving wheel (4b), and an unlocking button (5) capable of moving back and forth is arranged between the right driving wheel (4a) and the left driving wheel (4 b); and a plurality of clamping grooves (13a) matched with the unlocking button (5) are formed in the end surfaces of the right driving wheel (4a) and/or the left driving wheel (4b) and limit the rotation of the clamping grooves.

2. The folding handrail of claim 1, wherein: the folding mechanism is characterized by further comprising a second unlocking groove (13b) and a third clamping groove (13c), wherein the clamping groove (13a), the second unlocking groove (13b) and the third clamping groove (13c) are respectively and sequentially arranged on the outer edge of the right driving wheel (4a) and/or the outer edge of the left driving wheel (4b) and are used for being matched with the unlocking button (5) in different folding stages.

3. The folding handrail of claim 2, wherein: and a clamping part (6) is formed at one end of the unlocking button (5), and the clamping part (6) is clamped between the right driving wheel (4a) and the left driving wheel (4b) and limits the rotation of the right driving wheel and the left driving wheel.

4. The folding handrail of claim 1, wherein: the right end of the left handrail (3a) is connected with the right driving wheel (4a), and the left end of the right handrail (3b) is connected with the left driving wheel (4 b); the right driving wheel (4a) abuts against the left driving wheel (4b), and the right driving wheel (4a) and the left driving wheel (4b) rotate and fold by taking respective circle centers as axes.

5. The folding handrail of claim 4, wherein: the right transmission wheel (4a) and the left transmission wheel (4b) are both formed with wheel teeth (12), and the right transmission wheel (4a) and the left transmission wheel (4b) can be meshed with each other through the wheel teeth (12).

6. The folding handrail of claim 5, wherein: and armrest covers (7) are arranged on the outer sides of the right transmission wheel (4a) and the left transmission wheel (4b), and the other end of the unlocking button (5) extends out of the armrest covers (7) to form a pressing part (8).

7. The folding handrail of claim 6, wherein: a first spring (9) is arranged between the armrest cover (7) and the clamping part (6).

8. The folding handrail of claim 7, wherein: a support (10) is further mounted between the right driving wheel (4a), the left driving wheel (4b) and the armrest cover (7), hole sites (11) are formed in the left side and the right side of the support (10), and the right driving wheel (4a) and the left driving wheel (4b) are rotatably arranged on the hole sites (11) by taking respective circle centers as axes.

9. The utility model provides a folding scooter which characterized in that: the foldable handrail comprises the foldable handrail as claimed in any one of claims 1 to 8, and further comprises a vehicle pedal (1), wherein a handrail tube (2) is connected to the front part of the vehicle pedal (1), and the handrail tube (2) is rotatably arranged on the vehicle pedal (1) through a second folding device; the foldable handrail (3) is installed at the upper end of the handrail tube (2), the front wheels (37) are arranged at the lower end of the handrail tube (2), and the rear wheels (38) are arranged at the rear part of the bicycle pedal (1).

10. The folding scooter of claim 9, wherein: the folding handrail (3) is connected with the second folding device through a linkage mechanism, an unlocking button (5) is arranged in the folding handrail (3), and the folding handrail (3) and the handrail tube (2) can be folded simultaneously by pressing the unlocking button (5); the second folding device comprises a locking device (14) and a fork tube (15), an arc-shaped slide way (18) is formed in the locking device (14), a sliding block (19) is installed in the fork tube (15), a fixing shaft (20) penetrates through the lower end of the sliding block (19), and the fixing shaft (20) is slidably arranged in the arc-shaped slide way (18); the locking device (14) is installed at the front part of the pedal (1), and the lower end of the handrail tube (2) is rotatably connected with the locking device (14) through a fork tube (15) so as to be rotatably folded; locking clamping grooves (21) are formed in the two ends of the arc-shaped slide way (18) towards the inner side, the sliding block (19) and the fork tube (15) can be driven to move relatively by rotating the folding handrail (3) through the linkage mechanism, and then the fixed shaft (20) is driven to move in the arc-shaped slide way (18); a sliding head (22) is slidably arranged at the lower part of the handrail tube (2), an inclined surface (23) for the sliding head (22) to extrude is formed at the upper end of the sliding block (19), the folding handrail (3) is connected with and drives the sliding head (22) through the linkage mechanism, and the sliding head (22) can move in the handrail tube (2) by rotating the folding handrail (3), so that the inclined surface (23) is extruded, and the sliding block (19) is driven to move in the fork tube (15); a fixed head (25) is mounted at the upper end of the sliding head (22), the fixed head (25) is positioned at the upper end of the inclined surface (23) and fixed on the supporting pipe (2), and a second spring (26) is abutted between the fixed head (25) and the sliding head (22); the linkage mechanism is a steel wire rope group (24), and the folding handrail (3) is connected with and drives the second folding device through the steel wire rope group (24); a cavity (27) is formed in the middle of the sliding block (19), a semicircular hole (28) for allowing the fastening piece (17) to penetrate is formed in one side of the cavity (27), and a third spring (29) is abutted between the fastening piece (17) and the cavity (27); an inner pipe (30) penetrates through the handrail pipe (2), the upper end of the inner pipe (30) extends out of the handrail pipe (2) and is connected with the folding handrail (3), a sheath (31) is arranged between an opening at the upper end of the handrail pipe (2) and the inner pipe (30), an elastic opening (32) is formed in an opening at the upper end of the handrail pipe (2), and a quick-release piece (33) is arranged on the periphery of the elastic opening (32); an elastic pin piece (34) is elastically clamped in the inner pipe (30), the other end of the elastic pin piece (34) extends out of the inner pipe (30) and is provided with a convex block (35), and a plurality of positioning holes (36) for the convex block (35) to pass through are formed in the supporting pipe (2); the locking device (14) is provided with a rotating hole (16), one end of the fork tube (15) is rotatably fixed in the rotating hole (16) through a fastener (17), and the fork tube (15) can rotate and fold relative to the bicycle pedal (1).